CVE-2020-15564

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Summary

CVECVE-2020-15564
StatePUBLIC
Assigner[email protected]
Source PriorityCVE Program / NVD first with legacy fallback
Published2020-07-07 13:15:00 UTC
Updated2023-11-07 03:17:00 UTC
DescriptionAn issue was discovered in Xen through 4.13.x, allowing Arm guest OS users to cause a hypervisor crash because of a missing alignment check in VCPUOP_register_vcpu_info. The hypercall VCPUOP_register_vcpu_info is used by a guest to register a shared region with the hypervisor. The region will be mapped into Xen address space so it can be directly accessed. On Arm, the region is accessed with instructions that require a specific alignment. Unfortunately, there is no check that the address provided by the guest will be correctly aligned. As a result, a malicious guest could cause a hypervisor crash by passing a misaligned address. A malicious guest administrator may cause a hypervisor crash, resulting in a Denial of Service (DoS). All Xen versions are vulnerable. Only Arm systems are vulnerable. x86 systems are not affected.

Risk And Classification

Problem Types: CWE-119

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Operating System Debian Debian Linux 10.0 All All All
Operating System Debian Debian Linux 10.0 All All All
Operating System Fedoraproject Fedora 31 All All All
Operating System Fedoraproject Fedora 32 All All All
Operating System Xen Xen All All All All

References

ReferenceSourceLinkTags
Xen: Multiple vulnerabilities (GLSA 202007-02) — Gentoo security GENTOO security.gentoo.org
[SECURITY] Fedora 31 Update: xen-4.12.3-3.fc31 - package-announce - Fedora Mailing-Lists lists.fedoraproject.org
[SECURITY] Fedora 32 Update: xen-4.13.1-4.fc32 - package-announce - Fedora Mailing-Lists lists.fedoraproject.org
[SECURITY] Fedora 32 Update: xen-4.13.1-4.fc32 - package-announce - Fedora Mailing-Lists FEDORA lists.fedoraproject.org
oss-security - Xen Security Advisory 327 v3 (CVE-2020-15564) - Missing alignment check in VCPUOP_register_vcpu_info MLIST www.openwall.com Mailing List, Patch, Third Party Advisory
[SECURITY] Fedora 31 Update: xen-4.12.3-3.fc31 - package-announce - Fedora Mailing-Lists FEDORA lists.fedoraproject.org
XSA-327 - Xen Security Advisories MISC xenbits.xen.org Patch, Third Party Advisory
Debian -- Security Information -- DSA-4723-1 xen DEBIAN www.debian.org Third Party Advisory
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Legacy QID Mappings

  • 198943 Ubuntu Security Notification for Xen Vulnerabilities (USN-5617-1)
  • 500790 Alpine Linux Security Update for xen
  • 501510 Alpine Linux Security Update for xen
  • 504534 Alpine Linux Security Update for xen
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